Alchemist's Barrel

This wooden barrel is coated on the inside with a thin glass layer. Affixed to the glass lining, are four vials of alchemist fire, one in each corner of the barrel. This barrel is made to shatter upon impact, rupturing the Alchemist's Fire vials, and exploding the oil within. The barrel contains roughly 42 gallons of oil, or about 336 flasks worth. 

When the Alchemist's Barrel impacts a target and explodes, the oil (and thus fire) splashes an area within 30 feet around the target. 

The Alchemist Barrel counts as an improvised thrown weapon.  Range 20ft/60ft . Missing a target by 3 or less on the attack roll makes the barrel land 5 feet from the target in a random direction. Missing a target by 4 to 6 on the attack roll makes the barrel land within 10 feet of the target in a random direction. Missing a target by 7 to 9 on the attack roll makes the barrel land 20 feet from the target in a random direction.  Missing a target by 10 or more on the attack roll makes the barrel land in a random direction 30 feet from the target.  If you roll a 1 on the attack roll, the alchemist fire vials do not rupture, thus not igniting the barrel, but still splashing the area with oil. 

Dropping the Alchemist Barrel from a skyship changes the range increment to 100ft/1000ft and changes wisdom to be your primary ability modifier for the attack roll. If the shyship is travelling faster than 30 MPH, the attack roll has disadvantage. 

Damage: 

2d6 bludgeoning damage to the target, if they are hit by the barrel
5d6 fire damage to creatures and objects within 5 feet of impact (Dex Save 14 for half)
3d6 fire damage to creatures and objects within 10 feet around impact (Dex Save 13 for half)
2d6 fire damage to creatures and objects within 20 feet around impact (Dex Save 12 for half)
1d6 fire damage to creatures and objects within 30 feet around impact (Dex Save 11 for no damage)

Creatures within the area of affect who fail their dexterity saving throw are on fire and burn for 2 additional rounds. At the start of their turn, they take 1d6 fire damage. A creature may spend their action putting the flame out to stop burning.

Cost: 250 gp